Reducing-gear.



UNITED srivrns PATEN ersten.

GASTON HUllODlLIN AND FERNAND SC'I'lOEDELlN, Ol? PARIS, FRANCE.

all whom Vit may concern: =Befitiknownthat we, GAsroN Scnoennmx and FERN vnSCnonnnLlN, two citizens of `of France, and residents of ar1s,yl"rance,f.have invented a new and useful.lliiprovefment in Rediicing-Gears, which -;.;i mprovement is 'lnllv set forth in the following speei'lieation The. presentinvention has 'l'or its object a l0..reducing-gear. which permits oi' attaining a veryT great reduction ol speed bv means of .twogear wheels only.

The-.gear in accordance with the present f.i11ve1;Ltio.11-- comprises a bevel driving wheel I5 ,mountedflooselv upon a shaf t which is given ,agconicalmovement of rotation, this wheel ,-.fbeing at the same time guided in such a manil; 'nerthatit is unable to rotate while being free totoscillate,l and a bevel wheel driven'by the zlformer, this driven wheel being mounted upon a shaftdirected in the axis of the cone described `bythe shaft of the driving wheel. It is only necessary that the driven wheel ',eshould have/one or more teeth more or less a-thanthe 4driving wheel in order to oblige it stofrotate, this speed of rotation being ver)Y mallrelativelv to that of the driving shaft. l In order lthat the invention may be readily and l`elearl)r l understood, various construcurtionalyfforms' of the gearing-down device y. -foriningthe object of the invention, are illusl trated .by way of example in the accompany Y ng drawing, in which:

t Figure 1 is a longitudinal vertical section. "Fig -2iisa vertical cross-section, particularl)r yf-illustrati]1g the wheel solid with the gear incase, andthe wheel fixed. upon the driven sshaft.; Fig., 3 is a detailed view showing the wheel `upon the drivingshaft, and the supple- 40'1nientary-yWheel usedfor largereductions of ispeethg Fig. 4 shows in detail the wheel upon the driving shaft for gearing down to a less extent..y

1..;frthefarrangement represented in Fig. 1, is they driving shaft and?) the driven shaft. At the extremity of the driven shaft b, there is mounted a toothed wheel c inclosed in theI gear case d. A toothed crown e is arranged inthe same plane as the wheel c, and this Wheel may be solid with the gear case, as here represented, or it may be rotary, and mounted so as to slide freely with a brake pulley, in accordance with the varying applications. Within the gear case d, the driving shaft@ comprises an oblique part f of appropriate inclination, upon which a gear wheel Specification of Letters Patent.

Application filed August 30.1906. Serial No. 332,572.

REDUCING-GEAR`.

Patented Nov. 19, 1907.

g is mounted.l The height ol the teeth of the wheel g ma)v be such as represented in Figs. l and 3; in this case, there. is combined with the wheel g a sulmlementary wheel g (Figs. 1 and it), serving for gearing down to a large extent'. The teeth of the wheel g 'mesh with those of the crown e and those of the wheel g with the teeth of the wheel c. ln the case of `fearing down to a smaller extent, the obliqne Intrtfreceives only the wheel g (lf ig. 4), the height ol' the teeth on which enables them to mesh sinnlltanconsl)Y with the teeth of the crown f and with those of the wheel C. In any event, the driving shalt a. terminates in, a small bearing or stud o,I and this projection, which is in line with the driving sha'lt, enters a holt` l'ormed at the end of the driven shaft l). The .whole of this mechanism is inelosed in an oil bath gear ease d.

Assuming for the moment that the driving wheel or the wheel mounted upon the driving shaft is the wheel g (Fig. 4).

First era/m ,vlc of operatie n.-Gcdrin g down from 45 'revolutions to 1 revolution. The

driving wheel g has 46 teeth; the toothed crown e, 45 teeth; the driven wheel c, 46 teeth. It follows from this combination that the driving shaft a. being caused to rotate and rotating 45 times for example, the driven shaft b will make but one revolution. The wheel g owing to the ratio of the teeth which it possesses with the crown, only makes one revolution for 45 revolutions ol the driving shaft, and transmits this rotation, lin its movement. ol'` oscillation, to the wheel c solid with the shaft The two shafts rotate in the same. direction'.

Second eample-Gearifng donut from 45 'revolutions to 1 revolution-The driving wheel g has 44 teeth; the toothed crown, 45 teeth and the wheel c, 44 teeth. The shaft a makes 45 revolutions While the shaft b makes one revolution in the opposite direction, and as before the drivin(r wheel g rotates inthe same direction and at the same speed as the shaft b.

Third mampZe--Geari'ng down fro/111.45 to 1 The driving wheel g has 46 teeth', the toothed crown e 46 teeth, and the driven wheel c 45 teeth. The driving shaft a makes 45 revolutions, while the shaft l) makes 1 revolution in the opposite direction; the driving wheel oscillates without rotating.

Fourth example-Gearing down from 45 to .1.-The driving wheel g has 44 teeth; the toothed crown e 44 teeth, and the wheel c 45 driving shaft.

'lation-z teeth'. Theishaft a. makes 4 5 revolutions, y

while the'shaft b makes 1 revolution in the same'direction as the driving shaft; as before, the drivingwheel oscillates without ro- 'wheel g which 'meshes with the crown e has 46 teeth; the gear wheel g which meshes with the driven wheel c has 47 teeth, and the wheel c 46'teeth. In'these conditions the driving shaft a will make 2070 revolmions for l revolution of the driven shaft. F or 1 revolution of the shaft a, the driving wheel makes 11g of a revolution forward, and during the same time causes the wheel c mounted upon the shaft b to make 41 of a revolution backwards; from this it follows that this shaft in accordance with the calcu- 4 45 46 2070 2070-2070 v accomplishes 251,--., of a' revolution for one revolution of the driving shaft.

Second exam@ le of Zarge reduction Qfspeecl.- Thetcothed crown e has 100 teeth; 'the wheel g 101 teeth, the wheel g 102 teeth, .and the Wheel c 101 teeth. In 'these conditions, there is a reduction of ,-2,6 of a revolution forward, less 'T11-Tof a revolution backwards, thatis to say: A

'100 lOl-10100 l 10100v 10100 of a revolution in the same direction as the It will of course be understood that the above concrete examples have onll.1 been viven for the sake'ot` clearness, as other reiluctions may be obtained merelyfbyl changing the teeth on the wheels, care also being hadjtoappro riateh7 arrange the original diametersv of t e wheels, so as to cause the wheels to mesh on the original diameter in order to prevent wear of the teeth.

In cases in which the toothed crown e is mounted upon abrake pulley, as previouskr mentioned, it will be understood that upon releasing the brake the transmission of movement from the shaft will cease. descend.

driving shaftl to the driven i A suspended load would The gear forming the ob'ect ofthe present invention is applicable to all kinds of hoisting appliances or devices for dealing with loads such vas Winches, tackle, hoists, cranes,

weigh-bridges, capstans, and so forth, and

also to all other mechanisms requiring large reductions of speed. A

As compared with endless screw transmission for large reductions of speed, this gear'is advantageous owing to its higher eiiclencjj, and to the reduction of the wear resulting from the largenumlzer of teeth which are in' 65 lination of the mesh at once when the ir wheels is small.

Having thus described the nature of our invention, whatwe claim and desire to secure bj.' Letters Patent is:

1. ln a reducing gear, the combination with a driving shaft, having an inclined part,

and a driven shaft, of a beviel wheel mounted.

on the inclined part of the driving shaft and a second wheel on the driven shaft, the'axis of which coincides with that of the driving shaft, the wheel upon the inclined part of the driving shaft being adapted in rolling upon thesecondrwlieel to describe a cone and means to control the rotation o1r the Vdriving gear, sullstantialy as and for the purpose specified.

2. In a reducing;r `rear, thc combination with a driving shaft having an inclined part, and a driven shalt, of a bevel wheel, mounted upon the inclined )art of the driving shaft and a toothed w eel mounted upon`l the driven shaft, the axis of both said shafts coincidingrI with veach other, a case inclosingr the said gear, atoothed crown arl'an fed in the same lplane as the driven wheel an( solid with.

the gear`case, a sup lementarj/ wheel con-v nected with the driving wheel, the teeth of the latter being adapted to mesh with those oi the crown and ldie teeth of the supplementari.' wheel to mesh with those ofthe driven wheel, sul:stantiall' .;A as' and for the purpose speciiied.

1n testimolr "whereof we have signedthis specilicalion in the presence of two subscribing witnesses. L

GASTON S(,II( ),EDELI.\T. FERNAND SLHOEDEIAN;

Witnesses:

EMILE Lnnnn'r, II. C. Coxe. 

